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43 lines
1.1 KiB
Python
43 lines
1.1 KiB
Python
#!/usr/bin/env python
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"""
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Copyright (c) 2006-2017 sqlmap developers (http://sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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import os
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import string
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from lib.core.enums import PRIORITY
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from lib.core.common import singleTimeWarnMessage
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__priority__ = PRIORITY.LOWEST
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def tamper(payload, **kwargs):
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"""
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Unicode-escapes non-encoded characters in a given payload (not
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processing already encoded)
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Notes:
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* Useful to bypass weak filtering and/or WAFs in JSON contexes
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>>> tamper('SELECT FIELD%20FROM TABLE')
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'\u0053\u0045\u004C\u0045\u0043\u0054\u0020\u0046\u0049\u0045\u004C\u0044\u0020\u0046\u0052\u004F\u004D\u0020\u0054\u0041\u0042\u004C\u0045'
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"""
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retVal = payload
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if payload:
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retVal = ""
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i = 0
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while i < len(payload):
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if payload[i] == '%' and (i < len(payload) - 2) and payload[i + 1:i + 2] in string.hexdigits and payload[i + 2:i + 3] in string.hexdigits:
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retVal += "\\u00%s" % payload[i + 1:i + 3]
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i += 3
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else:
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retVal += '\\u%.4X' % ord(payload[i])
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i += 1
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return retVal
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